Cheap Flights from Ontario International Airport to Bangkok from $866 Roundtrip

Flight deals from Ontario International Airport to Bangkok

Looking for a cheap last-minute deal or the best roundtrip flight from Ontario International Airport to Bangkok? If you want to travel next month, roundtrip fares start from $1,195. Find the lowest prices on one-way and roundtrip tickets right here.

Bangkok.$866 per passenger.Departing Mon, Jul 20, returning Mon, Jul 27.Round-trip flight with Korean Air.Outbound indirect flight with Korean Air, departing from Ontario International on Mon, Jul 20, arriving in Bangkok Suvarnabhumi.Inbound indirect flight with Korean Air, departing from Bangkok Suvarnabhumi on Mon, Jul 27, arriving in Ontario International.Price includes taxes and charges.From $866, select.

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Flying from Ontario International Airport to Bangkok

Arm yourself with these facts on the fly.

Cheapest flight found	$866
Cheapest month to fly	July

How to find cheap flights from Ontario International Airport to Bangkok

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Ontario International Airport to Bangkok. Other savvy travelers recently found round-trip flights from $866 and one-way tickets from $455. Ready to join them? Here are a few tips to help you do it the smart way.

Fly in July

The cheapest time to fly from Ontario International Airport to Bangkok is currently July.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Ontario International Airport to anywhere you choose in Bangkok.

Watch as flight prices go up and down

With Price Alerts, we'll let you know when flight prices from Ontario International Airport to your chosen airport in Bangkok go up or down so you can book when the time is just right.

Relax – these are fee-free plane tickets

With us, there are no added fees – the Bangkok Airport to Bangkok flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

What is the average price of a flight from Ontario International Airport to Bangkok?

We looked at all of the upcoming round-trip flights from Ontario International Airport to Bangkok we could find over the next 12 months. It looks like $866 is the best price. This is good, compared to the average Bangkok ticket price of $866.

What is the cheapest month to fly from Ontario International Airport to Bangkok?

The cheapest month to fly from Ontario International Airport to Bangkok is currently July.

On which upcoming date is it cheapest to fly from Ontario International Airport to Bangkok?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Ontario International Airport to Bangkok on Monday, July 20, 2026.

If I'm flying from Ontario International Airport, where in Bangkok is cheapest to fly to?

If you're flying from Ontario International, the cheapest city in Bangkok to fly into is Bangkok. The cheapest airport serving Bangkok at the moment is Bangkok Suvarnabhumi.